<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>

        function formatDate() {
            var date = new Date();
            var year = date.getFullYear();
            var month = date.getMonth() + 1;
            // month = month < 10 ? '0' + month : month;
            var day = date.getDate();
            var hour = date.getHours();
            var minute = date.getMinutes();
            var second = date.getSeconds();

            var week = date.getDay();

            // 补零

            var arr = ['星期天', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'];

            return year + '/' + month + '/' + day + ' ' + hour + ':' + minute + ':' + second + ' ' + arr[week]
        }


        document.write(formatDate())

    </script>

</body>

</html>